As I'm putting wheel and tire packages together for my 16 I continue to contemplate the DPF, DEF EGR elimination. I have never left an exhaust on any truck I have owned stock. However, I live in an emissions county. I would have to be prepared to put the stock exhaust back on in about 2 years ( first emissions check ) and put it back on every year after. I would really like to UN-choke this motor and get the soot recirculator off of it. But man I don't want the headaches of changing it back and forth. Since the kids are married and at college we may be moving ( downsizing ) and a non emissions county would be in the works.....hopefully before the first emissions check. How hard is it to change this this stuff back and forth?